Driving structure of electric ball valve

Abstract

The utility model discloses a driving structure of an electric ball valve, and mainly relates to the field of electric ball valves. Comprising a first limit switch used for controlling stopping of reverse rotation of a motor, a second limit switch used for controlling stopping of forward rotation of the motor and a relay, and a first pin of the motor and a first pin of the second limit switch are both connected with the nc + end of the relay. A second pin of the motor and a second pin of the first limit switch are connected with the no + end of the relay, a first pin of the first limit switch is connected with the nc-end of the relay, and a second pin of the second limit switch is connected with the no-end of the relay; the utility model relates to a capacitance-free electric ball valve, which can realize stable and accurate opening and closing of the ball valve and avoid the problem of untight closing of the ball valve.

Description

Technical Field

[0001] The utility model relates to the field of electric ball valves, in particular to a driving structure of an electric ball valve. Background Art

[0002] The management methods of water resources vary in different fields, but in most scenarios, it is necessary to control the cutoff and flow of water pipes, and electric ball valves can meet this requirement. Electric ball valves are an important actuator of industrial automation control systems, mainly used to cut off or connect the medium in the pipeline, and can be used for fluid regulation and control.

[0003] At present, most of the existing electric ball valves use capacitors to drive the motor inside. However, the life of the capacitor is limited. Long-term use and high voltage and high current in the circuit may cause the capacitor to age and be damaged. Once the capacitor fails, the electric ball valve may not work properly. Secondly, the capacitor is sensitive to changes in temperature and humidity. In a high temperature or high humidity environment, the performance of the capacitor may be affected, causing the electric ball valve to work unstable or fail. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art and provide a driving structure of an electric ball valve, which is a capacitor-free electric ball valve, which can realize stable and accurate opening and closing of the ball valve and avoid the problem of loose closing of the ball valve.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:

[0006] A drive structure for an electric ball valve includes a first limit switch for controlling the stopping of reverse rotation of a motor, a second limit switch for controlling the stopping of forward rotation of the motor, and a relay, wherein the first pin of the motor and the first pin of the second limit switch are both connected to the nc+ end of the relay, the second pin of the motor and the second pin of the first limit switch are both connected to the no+ end of the relay, the first pin of the first limit switch is connected to the nc- end of the relay, and the second pin of the second limit switch is connected to the no- end of the relay.

[0007] Preferably, the driving structure of the electric ball valve also includes a circuit board, which is provided with a motor interface for connecting to the motor, a first interface for connecting to the first limit switch, a second interface for connecting to the second limit switch, an NC+ end interface for connecting to the NC+ end of the relay, a NO+ end interface for connecting to the NO+ end of the relay, an NC- end interface for connecting to the NC- end of the relay, and a NO- end interface for connecting to the NO- end of the relay.

[0008] Preferably, the circuit board is provided with a motor mounting hole adapted to the motor.

[0009] Preferably, the circuit board is provided with a plurality of screw mounting holes.

[0010] Preferably, the circuit board is connected using an XH2.54 interface.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model controls the opening and closing of the ball valve by directly powering the device. The capacitor-free design is more suitable for working in harsh environments. The ball valve automatically stops rotating when it is in the right position. There is no power consumption in the stopped state, which makes it suitable for long-term work in harsh environments. It operates stably and opens and closes in the right position. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural principle diagram of the utility model;

[0014] Figure 2 It is a structural diagram of the utility model.

[0015] The numbers shown in the accompanying drawings are: 1, motor; 2, first limit switch; 3, second limit switch; 4, relay; 5, circuit board; 51, motor interface; 52, first interface; 53, second interface; 54, motor mounting hole; 55, screw mounting hole. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the contents of this invention, those skilled in the art may make various changes or modifications to the present invention, and that these equivalent forms also fall within the scope defined in this application.

[0017] Example: As shown in the attached Figure 1-2 As shown, the utility model is a driving structure of an electric ball valve, including a first limit switch 2 for controlling the stop of reverse rotation of the motor 1, a second limit switch 3 for controlling the stop of forward rotation of the motor 1, and a relay 4. The first pin of the motor 1 and the first pin of the second limit switch 3 are both connected to the nc+ end of the relay 4, the second pin of the motor 1 and the second pin of the first limit switch 2 are both connected to the no+ end of the relay 4, the first pin of the first limit switch 2 is connected to the nc- end of the relay 4, and the second pin of the second limit switch 3 is connected to the no- end of the relay 4.

[0018] Relay 4 controls the positive and negative poles of the output power supply and controls the direction of the current. When relay 4 is in the normally open state, nc+ outputs the positive pole, nc- outputs the negative pole, and motor 1 rotates counterclockwise. When motor 1 rotates counterclockwise and touches the first limit switch 2, the first limit switch 2 disconnects the circuit, and no current no longer flows in the circuit, and motor 1 stops; when relay 4 is in the normally closed state, no+ outputs the positive pole, no- outputs the negative pole, and motor 1 rotates clockwise. When motor 1 rotates clockwise and touches the second limit switch 3, the second limit switch 3 disconnects the circuit, and no current no longer flows in the circuit, and motor 1 stops.

[0019] The driving structure of the electric ball valve also includes a circuit board 5, which is provided with a motor interface 51 for connecting to the motor 1, a first interface 52 for connecting to the first limit switch 2, a second interface 53 for connecting to the second limit switch 3, an NC+ end interface for connecting to the NC+ end of the relay 4, a NO+ end interface for connecting to the NO+ end of the relay 4, an NC- end interface for connecting to the NC- end of the relay 4, and a NO- end interface for connecting to the NO- end of the relay 4.

[0020] Preferably, the circuit board 5 is provided with a motor mounting hole 54 adapted to the motor 1 . Furthermore, the circuit board 5 is provided with a plurality of screw mounting holes 55 . The circuit board 5 is sleeved on the motor 1 and is fixed by screwing M4 screws into the screw mounting holes 55 .

[0021] Preferably, the circuit board 5 is connected via an XH2.54 interface, which is convenient for connection.

Claims

1. A driving structure for an electric ball valve, characterized in that: The invention comprises a first limit switch (2) for controlling the stop of reverse rotation of a motor (1), a second limit switch (3) for controlling the stop of forward rotation of the motor (1), and a relay (4); the first pin of the motor (1) and the first pin of the second limit switch (3) are both connected to the nc+ end of the relay (4); the second pin of the motor (1) and the second pin of the first limit switch (2) are both connected to the no+ end of the relay (4); the first pin of the first limit switch (2) is connected to the nc- end of the relay (4); and the second pin of the second limit switch (3) is connected to the no- end of the relay (4).

2. The driving structure of an electric ball valve according to claim 1, characterized in that: The driving structure of the electric ball valve further comprises a circuit board (5), wherein the circuit board (5) is provided with a motor interface (51) for connecting to the motor (1), a first interface (52) for connecting to the first limit switch (2), a second interface (53) for connecting to the second limit switch (3), an NC+ terminal interface for connecting to the NC+ terminal of the relay (4), an NO+ terminal interface for connecting to the NO+ terminal of the relay (4), an NC- terminal interface for connecting to the NC- terminal of the relay (4), and an NO- terminal interface for connecting to the NO- terminal of the relay (4).

3. The driving structure of an electric ball valve according to claim 2, characterized in that: The circuit board (5) is provided with a motor mounting hole (54) adapted to the motor (1).

4. The driving structure of an electric ball valve according to claim 3, characterized in that: The circuit board (5) is provided with a plurality of screw mounting holes (55).

5. The driving structure of an electric ball valve according to claim 2, characterized in that: The circuit board (5) is connected using an XH2.54 interface.

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